L.,
Have you tried just going out and just reconnecting? Having a baby changes the lives of everyone. Sometimes just going out like "before" helps. What about a romantic overnight out? This is a personal favorite for us. We spend a night at our favorite hotel and relax...NO KIDS,NO CALLS, NO WORK, NOTHING!
If you have tried these things and are still having issues, you have to remember that having a baby is a taxing experience, you just had a baby 3 1/2 months ago, your mind and body is still processing the changes so much so that sex is not on its top priority list.
This of course won't last forever but your husband needs to be patient and learn the art of self satisfaction in the interim. There is a huge section in borders, waldenbooks and barnes and noble on the issues that arise in couples after having a baby. My husband loved, She's Having A Baby and I'm Having A Breakdown.
It took me over 8 months to recover after a disasterous C-Section and about 4 months after giving birth to my oldest daughter (which was a vaginal birth) before I thought about having intimate relations, I didn't even want my husband to touch me in anyway.
Talk to your husband and be sure to keep the lines of communication open so that he knows what you are feeling and thinking. This is just a temporary situation. Good Luck and I hope this helps.
Bella